Journal Article New world record efficiency for pure-sulfide Cu(In,Ga)S2 thin-film solar cell with Cd-free buffer layer via KCN-free process

廣井, 誉  ,  Hiroi, Homare  ,  岩田, 恭彰  ,  Iwata, Yasuaki  ,  杉本, 広紀  ,  Sugimoto, Hiroki  ,  山田, 明  ,  YAMADA, AKIRA

6pp.760 - 763 , 2016-03 , IEEE
World-record conversion efficiency of 15.5%, which is a number independently certified by an external accredited laboratory, was achieved on a pure-sulfide Cu(In,Ga)S2 (CIGS) thin-film solar cell fabricated by metal sputtering and H2S gas sulfurization. This is the highest conversion efficiency reported for pure-sulfide CIGS thin-film solar cells. We exceeded the limit of 15% efficiency thanks to the buffer layer optimization. The buffer layer consists of Cd-free materials, and the absorber was fabricated via a KCN-free process.

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